a close up vert. grip is good for room clearing and clearing your way up a stairwell. it gives you quick target acquisition and quick muzzle direction changes (multiple targets, etc). pretty much useless long range IMO, but in confined areas its great. When I moved my grip forward, I found that I was able to drive the weapon a little bit better towards different targets. May not make as big of a difference if you are using a short handguard, but a VFG or AFG forward mounted on a rifle handguard vs rear mounted on a carbine handguard is huge difference, at least to me.